222221122200 has 432 divisors, whose sum is σ = 937497965040. Its totient is φ = 46175500800.

The previous prime is 222221122177. The next prime is 222221122213. The reversal of 222221122200 is 2221122222.

222221122200 is a `hidden beast` number, since 222 + 221 + 1 + 2 + 220 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1451722 + ... + 1597478.

Almost surely, 2^222221122200 is an apocalyptic number.

222221122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222221122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468748982520).

222221122200 is an abundant number, since it is smaller than the sum of its proper divisors (715276842840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222221122200 is a wasteful number, since it uses less digits than its factorization.

222221122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145808 (or 145785 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222221122200 its reverse (2221122222), we get a palindrome (224442244422).

The spelling of 222221122200 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred".